Cement-treating process.



lR. W. LESLEY 6L H. S. SPAGKMAN.

CEMENT TBEATING PROCESS.

APPLICATION FILED MAR. 10, 1908.

Patented Apr. 4, 1911.

5mm/Whom @wi/Immo@ t 94@ l I Y following is a specification,

v meral v figures, Figure 1 is a l kiln; and Fig. a

-with aheavy cover 11 To all whmn tHrw/y concern:

that we, Ronn'r W. LnsLEY,

example, by runnin 'UNITED smntr'sTAirENT OFFICE.

ROBERT W. LESLEY, QF HAVEBFBD, AND HENRY Erz'BBACKMAN, 0F ABDKOBE,PENNSYLVANIA.

CEMENT-TREATING PROCESS.

Be it known residing at Haverford vand HENRY S. SPAGKMAN, residing atrdmore, county of Montgomery, and State of Pennsylvania, citizens of theUnited States, have made certain new and useful Inventions Relating toCement-Treating Processes, of which the taken in connection with theaccompanying drawings, forming part' of the same.

This invention-relates to cement treating processes and relatesespecially to processes for treating Portland cement clinker, for ltheintensely heated clinker from a rotary 'ln into a receiver and treatingthe same for the steam at high pressure (generated by spraying waterupon the heate -material in a closed receiver or otherwise, so that theclinker is disintegrated or made friable so as to facilitate grindingand its aging or hydration to the desired extent iseiected, that is, thefree or objectionably loosely combined lime or maginesia in the clinkeris hydrated or reduce to other forms.

In the accompanying drawing showing in a somewhat diagrammatic mannerillustrative apparatus forcarrying out these processes, and in which thesame reference nurefers to similar parts in the several vertical sectionshowconnection with a cement is a vertical section showing a treatingchamber and receivers. v

One form of -receiver which may be used in carrying out this process isillustrated as comprising the carriage 6 mounted on wheels 7 andcarrying the trunnions 42 of the receiver `5 :so that the receiver maybe more readily emptied. The receiver may be ing a receiver in 1ning ofrefractory-material, if desired. If desired Aalso 4thereceiverr may beprovided pivoted about the pin 8 and firmly held in c osed position bythe clamping screw 9 and nut 10 coperating with the lugs -`9 onhermetically close the same in connection with suitable packing, ifdesired. The cover constructed of heavy metal with an open top andprovided with a heat insulating may be provided with a suitable funnellshaped throat 13 formed with a gate or other tight f closure12. It isalso desirable Speoication o! Letters Patent. Application-mea Ilh I0,1998. slil N0.' 420,170.

desired time with the rece' er so as toA Patented Apr. 191.1'.-

to form a suitable safety or relief valve 14 on the receiver or cover soas to prevent the development of excessive pressure within the receiver.Any desired arrangement may be used f or supplying water or otheraqueous material, suc as steam under pressure, to the receiver and thismay be done by mountmg a' suitable sprayer 16 in the receiver so as toallow water or steam to be forced past the check valve 41 to act on thecharge of material. A suitable pump 17 may under these conditions supplywater under pressure through the plpe 15 connected by the cou 11n 40with the sprayer.

e ortland cement clinker, for example, produced in the rotary kiln 1heated by the burner tube 2 in the ordinary way, may be allowed to fallthrough the clinker chute 4 in the hood 3 so as to enter the throat 13of the receiver. When a sulicient charge has accumulated. in thereceiver the gate 12 may be closed and water or steam from the s rayer16 forced upon the hi hly heated c inker material 'which immefatelylproduces superheated steam and creates as high av steam pressure asdesired, this pressure bemg regulated of course within the desiredlimits by the safety valve 14. It is, of course, understood that whilethis treatment is taklng place in one receiver another empty receivermay be moved into charging position under the clinker chute so as not tointerrupt the operation of the kiln. Steam under such high pressures asone hundred or two hundred pounds, for example, ex-

ertsv a strong'dislntegrating action on cement clinker and in some casescom letely pulverizes the same and with clinEer of other compositionsdisintegrates the clinker sufficiently to make it very friable andmaterially reduce the diiiiculty of 'nding. .Such steam treatment, ofcourse, e ects the thorough hydration of any free lime or magsA nesiawhich might otherwise be objectionable in the finished cement so as toeilect an. artificial aging of the cement and render the finishedproduct much more reliable. This high ressure steam treatment may becon-l tinued) for a considerable time in the receiver when using waterin such a closed receiver, as indicated i'n Fig'. 1, that is, until theheat of the clinker has been dissi ated. If with the articular materialtrea this duration o treatment is suflicient the' an entrance lock 23,inain treating chamber 24 and dischar e lock 25. By opening the endgates 19, tge receiver carriage may be run into the entrance lock uponthe track 26 so as toassume the position 46 and then by opening the lockgates 20 the receiverV may move down the suit-ably inclined tracks 26 soas to assume the osition 56, the gates being properly manipu ated as inthe case of the treatment of sand-lime brick and similar material. Steamunder the-desired preure may be supplied to the chamber 24 through thesteam supply pipe 27, the pressure being ofcourse regulated by the useof suitable relief valves such as 28, which may be used on the variouscompartments of the chamber. This steam can, of course, force its waypast the check valves in the' pipes 15 into the various receivers or thegatesv 12 may be opened before running the 'receivers intothe treatingchamber. The receivers may be kept within the treating chamber for anydesired length of time, the treatment lasting for a number of hours, ifdesired, to thoroughl act upon the material, the -treating cham er beingof course made suiliciently long-to, accommodate the desired number ofreceivers. Finally the receiversl are taken out of the chamber 24 pastthe lock gates 21 and then past the end gates 22.

If desired, of course, instead of commencing this hydration treatmentofthe clinker in the rimary receiver adjacent the kiln as descri ed, thereceiver containing the charge of clinkerJ from the kiln may be rundirectly into the treating chamber and there1 put under steam pressureof preferably about one hundredor two hundred pounds per square inch,although lower pressures may be used in the rimary receiver treatmentadjacent the kiln and in this process,

but necessitate longer treatments. In thisv case, it is not, of course,necessary to employ any covers for the receivers which merely convey hotclinker, or if desired cold clinker into the treating chamber, whichmaintains the steam pressure without depending upon the strength of thereceiver itself,so as to eiiect the desired aging and to promote thedisintegration of the treated material. The

. duration ofthe steam treating process seems to depend upon the steam'pressure used, the chemical composition of the clinker, the temperatureat which it was burned and the tempera-ture at which it is brought'intocony tact with the steam; andgenerally speaking, higher steam pressure,higher lime content in the clinker, vsofter burning of the clinker andlhigher temperature of the clinker when brought into contact with thesteam promote and hasten the aging and disintegrating action.

Having described this invention in coninection with illustrativeexamples 'and forms of apparatus, to the details of which disclosure theinventionis not of course to be limited, what is claimed as new and whatis desired to be secured b set forth in the appendedy claims.

l. The cement process which consists in running highly heated cementclinker into a receiver, in hermetically closing said receiver andspraying water intocontact with the highl heated material and inmaintaining the igh pressure steam developed in Letters Patent iscontact with the clinkerlmaterial to effect l the disintegration andaging thereof and' in moving said receiver into a treating chamberv andsub ectmg the receiver and contained material to the action of highpressure steam to effect furtherv disintegration and a 'ng. l

'2. T e cementprocess which consists in running highly heated cementclinker into a receiver, in closing said receiver. and spraying aqueousmaterial into the same and maintaining said receiver under high pressure.to effect the disintegration and aging of the clinker material and inlmoving said receiver into a high pressure treatin chamberand subjectingthe same'and t e contained clinker material to the. action of highpressure aqueous material to effect further disintegration and aging.

3. The cement process which consists in spraying highly heated cementclinker with aqueous material and maintaining and a g thereof.

4. ,T e cement process which consists in` treating highly heated `cementclinker with the same` vunder high pressure to effect disintegrationaqueous material under pressure of about one hundred or two hundredpounds to the square inch to eii'ect disintegration and aging of suchmaterial. p l

5. The ycement process which consists in treatingheated cement clinkermaterial with aqueous material under high pressure to effectdisintegration of said clinker material. 6. The cement process whichconsists in running highly `heated cement clinker directly from a kilnii'ito a receiver, in vhermetically closing said receiver and forcinaqueous) material .into contact with said clinker material and inmaintaining the same 'under high'pressure to effect the disintegrationand aging of said clinker material. 7. The cement process w'hicfrconsists in treating clinker material wit aqueous vaes"e,724

por under .the pressure of about one hundred to two hundred pounds persquare inch for sufficient time to effect disintegration and aginthereof.

8. he cement process which consists in treatin clinker material withaqueousvvapor un er high pressure forsuficient time to age the same andrender the same friable and easily grindable.

-9. The cement process which consists in treating cement .clmkermaterial with aqueaqueous vapor under high pressure to promote thedisintegration and a 'ng thereof.'

R. W. LESLE?. HENRY S. SPACKMAN. -Witnessesz J. F. LENNIG, E. A. Timeo.

